An uninterruptible power supply (UPS) is needed if a high level of availability is a must for a particular computer centre and the company cannot afford to have any downtimes. The most important distinguishing feature of UPS systems is their mode of operation in accordance with EN 50091-3, IEC 62040-3:1999 and VDE 0558 section 530. The aim of this kind of classification is to allow manufacturer data to be compared. Lampertz offers solutions for UPS systems. This means that an additional infrastructure is now integrated with proven Lampertz experience.